Article
Materials Science, Ceramics
Shadpour Mallakpour, Mina Naghdi
Summary: A bone scaffold was fabricated using a hybrid of TiO2@LDH to leverage the advantages of both nanostructures, with LDH providing a suitable bed for TiO2 nanoparticles and Alg embedding them for stability. The scaffold showed excellent biomineralization and antibacterial properties, making it a promising candidate for bone tissue engineering.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Aymen Zahrouni, Ikram Benammar, Omar Harzallah, Sophie Bistac, Rached Salhi
Summary: This study examined the impact of adding 5wt% of SiO2-TiO2 nanoparticles to polyester-fiberglass on the nanocomposite's structural, mechanical, and thermal behaviors. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to analyze the surface modification and morphology of the nanocomposites. The addition of SiO2-TiO2 nanoparticles altered the crystalline state and microstructure, resulting in improved mechanical properties and thermal resistance of the nanocomposite.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Habib Chenaina, Charfeddine Messaadi, Jalila Jalali, Hatem Ezzaouia
Summary: This study focuses on sol-gel derived SnO2-TiO2 thin films deposited on silicon wafer type Si (100) substrate using spin coating technique, followed by heat treatments at four different temperatures. XRD characterization reveals the formation of nano-crystalline phase at 400 degrees C and further crystallization with increasing annealing temperature. Optical and dielectric properties analysis demonstrates universal many body response over a broad frequency range, presenting variations in structure and performance of the films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Luis Roberto Ruiz-Ramirez, Jonatan Torres-Perez, Nahum Medellin-Castillo, Simon Yobanny Reyes-Lopez
Summary: The contamination and dispersion of antibiotics through sewage treatment plant effluents is causing the emergence of resistant bacteria, leading to a health emergency. In order to eliminate antibiotics in effluents, advanced oxidation processes, especially photocatalysis, have been used for their efficient degradation. In this study, SiO2-TiO2 fibers with a cylindrical morphology and smooth surface were obtained using sol-gel and electrospinning techniques. By doping the fibers with silver, their photocatalytic properties were enhanced, and the degradation percentage of oxytetracycline increased from 65% to 90% in 7 hours. The improved performance is attributed to the decrease in the banned band energy of SiO2-TiO2 fibers from 3.1eV to 2.5eV due to silver doping.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Physical
Yuanting Wu, Mengyao Guan, Xiaojing Chang, Jinrong Wang, Shuming Xu
Summary: We constructed a homogeneous double-layer TiO2-ZrO2-SiO2 photocatalyst with multi-heterojunction (D-TZS) using a simple sol-gel method, which effectively improves the photocatalytic property. By investigating various factors, we found that D-TZS can degrade Rh B by about 99.6% within 40 minutes and almost completely degrade it within 60 minutes. This is attributed to the homogeneity, multiple heterojunctions, and oxygen vacancies of D-TZS.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Manh-Cuong Le, Thu-Huong Le, Thanh-Huyen Bui Thi, Quang-Dat Nguyen, Thanh-Ha Do Thi, Minh-Nguyet Tran Thi
Summary: The addition of SiO2 in the TiO2/SiO2 nanocomposite significantly enhances the photocatalytic and antibacterial abilities of the silicate coating, with the best performance observed at a SiO2 content of 15%. This is attributed to the larger surface area provided by TiO2/SiO2 Nc (15%) in the W silicate coating, which increases centers for absorption, photocatalytic reactions, and contact between the sample and bacteria.
FRONTIERS IN CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Manal Alkhabbas, Fadwa Odeh, Khitam Alzughoul, Razan Afaneh, Waed Alahmad
Summary: TiO2-Kaolinite nanocomposite photocatalysts were synthesized using the sol-gel method, with titanium isopropoxide/HCl as reactants and Jordanian kaolinite clay as a support material. The increase in TiO2 content led to increased intensity of anatase peaks in XRD measurements and increased peaks of Ti-O-Si in FTIR. The nanocomposites showed high photocatalytic activity in degrading Congo-red dye under sunlight.
Article
Chemistry, Physical
Naoki Tarutani, Yuka Honda, Risa Hamakawa, Tetsuo Uchikoshi, Takamasa Ishigaki
Summary: The study focused on the confinement of water in hollow SiO2 nanoparticles, with water introduced into the hollow spaces passing through the mesopores of the shells and then confined by thickening the shell. It was found that the amount of water retained increased with shell thickness, and the resulting water-HSNP nanocomposites exhibited effective far-infrared absorption capabilities. The easy confinement approach reported in this study may lead to highly functional complex nanocomposites.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Z. Hayati, B. Hoomehr, F. Khalesi, K. Raeissi
Summary: Titanium dioxide-silica composite nanoparticles were synthesized using a verified Stober sol-gel method. The resulting nanoparticles consisted of titanium dioxide cores surrounded by ultrafine silica particles, forming a thin shell. These nanoparticles were deposited on a stainless steel substrate via electrophoretic deposition to enhance its biological response. The presence of a silica shell increased the surface roughness, eliminated cracks, and improved the adhesion and barrier performance of the coating.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Tamim Mohammad Hasham, Burak Ay, Dogan Kaya, Emel Yildiz, Ahmet Ekicibil
Summary: New nanostructures of TiO2/VOx, TiO2/SiO2, and VOx/SiO2 were synthesized via hydrothermal methods and characterized. The X-ray diffraction results showed an increase in the anatase structure of each structure. The nanostructures exhibited weak ferromagnetic behavior with a coercive field, and their magnetic properties were found to be dependent on temperature and composite composition.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Shumaila Islam, Adil Alshoaibi, Hazri Bakhtiar, Kawther Alamer, Javed Mazher, Zakia Hassan Alhashem, Mohammad Rafe Hatshan, Shrouq H. Aleithan
Summary: Due to polluted water remediation, semiconductor nano photocatalysis has been considered as a promising approach to address the issue. However, the slow reaction rates and high electron-hole recombination have hindered their large-scale applications. In this study, heterogeneous nano photocatalysts, such as sol-gel-based mesoporous titania nanoparticles (TNPs) and silica-titania nanocomposite (STNC) supported with CdTe (CdTe/STNC), were synthesized for photocatalytic applications. The CdTe/STNC catalyst exhibited a large surface area and pore size distribution, and demonstrated high photocatalytic activity with methylene blue degradation of 95% after 180 min of ultraviolet radiation.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Yuanting Wu, Senmao Ren, Xiaojing Chang, Xinmeng Zhang
Summary: This study demonstrated the preparation of TiO2-ZrO2-SiO2 nano-powders to enhance the synergistic effect of adsorption and degradation in photocatalytic materials. The TiO2-ZrO2-SiO2 system showed excellent photocatalytic performance and adsorption ability, with SiO2 acting as an adsorbent and TiO2-ZrO2 acting synergistically as a photocatalyst. The enhanced photocatalytic ability was attributed to factors such as accelerated mass transfer, narrowed bandgap, and effective charge separation rate. The synergy effect between adsorption and photocatalysis was evaluated using the synergy factor beta, showing remarkable synergistic effect in the TiO2-ZrO2-SiO2 compound system.
Article
Materials Science, Multidisciplinary
Ahlem Bendaoued, Mouna Messaoud, Omar Harzallah, Sophie Bistac, Rached Salhi
Summary: In this paper, nanofillers obtained by Sol-gel method were added as fillers in polypropylene composites to enhance the thermal and rheological properties and ensure good interface compatibility. The synthesized nano-TiO2 powders exhibited excellent thermal stability and viscoelasticity. The study showed that the molar ratio of TiO2 influenced the final thermal stability and degree of crystallinity of the polypropylene matrix. The incorporation of 5wt% TiO2 was found to be an effective and promising method to improve the rheological properties of the resulting composite.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
M. A. M. L. Jesus, A. M. Ferreira, L. F. S. Lima, G. F. Batista, R. V. Mambrini, N. D. S. Mohallem
Summary: Micro-mesoporous TiO2/SiO2 nanocomposite powders were successfully synthesized using the sol-gel process, with Si60Ti40 powders exhibiting the highest specific surface area. Si80Ti20 powders showed better degradation of quinoline in the presence of H2O2 compared to pure sol-gel TiO2 powders, attributed to small TiO2 anatase crystallite size, high dispersion, great specific surface area, and formation of Ti-O-Si bond.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Multidisciplinary
Cheng Chang, Saeed Rad, Lei Gan, Zitao Li, Junfeng Dai, Asfandyar Shahab
Summary: This review provides a comprehensive overview of the chemicals, reaction conditions, and procedures required for preparing nano TiO2 using the sol-gel method. It analyzes the influencing factors and their impact on the final product. This information is essential for controlling the properties of the resulting TiO2 gel/powder for targeted applications.
NANOTECHNOLOGY REVIEWS
(2023)
Article
Metallurgy & Metallurgical Engineering
Neena Bachan, A. Asha, W. Jothi Jeyarani, D. Arun Kumar, J. Merline Shyla
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2015)
Article
Engineering, Chemical
W. Jothi Jeyarani, Tenzin Tenkyong, Neena Bachan, D. Arun Kumar, J. Merline Shyla
ADVANCED POWDER TECHNOLOGY
(2016)
Article
Materials Science, Multidisciplinary
D. Arun Kumar, J. Alex Xavier, J. Merline Shyla, Francis P. Xavier
JOURNAL OF MATERIALS SCIENCE
(2013)
Article
Nanoscience & Nanotechnology
Frank Wilson Amalraj, Arun Kumar Dhasiyan, Yi Lu, Naohiro Shimizu, Osamu Oda, Kenji Ishikawa, Hiroki Kondo, Makoto Sekine, Nobuyuki Ikarashi, Masaru Hori
Article
Engineering, Electrical & Electronic
Yasuhiro Isobe, Takayuki Sakai, Naoharu Sugiyama, Ichiro Mizushima, Kyoichi Suguro, Naoto Miyashita, Yi Lu, Amalraj Frank Wilson, Dhasiyan Arun Kumar, Nobuyuki Ikarashi, Hiroki Kondo, Kenji Ishikawa, Naohiro Shimizu, Osamu Oda, Makoto Sekine, Masaru Hori
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2019)